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沙棘AM真菌孢子形态结构及其生态适应性

, PP. 96-100

Keywords: 沙棘(Hippophae,rhamnoides],L.),AM真菌,形态结构,生态适应性,农牧交错带

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Abstract:

为了探明干旱环境下AM真菌形态结构及其生态适应性,2009年7月在内蒙古和河北农牧交错带选取4个样地,采集沙棘(HippophaerhamnoidesL.)根围土壤样品,利用光学显微镜和扫描电镜对分离的AM真菌进行分类鉴定。共分离鉴定3属17种AM真菌,其中球囊霉属(Glomus)11种,无梗囊霉属(Acaulospora)5种,盾巨孢囊霉属(Scutellospora)1种。沙棘AM真菌孢子具有体积小、颜色深、孢壁厚,整体形态不饱满等特征,表现出对干旱荒漠环境的生态适应性。扫描电镜下,不同属种孢子表面纹饰特征差异明显,可作为AM真菌属种分类的参考依据。

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